Summary of Declassified Nuclear Stockpile Information

United States Department of Defense and Department of Energy

Declassified Stockpile Data 1945 to 1994

Total quantities cover years 1945 to 1961. Total quantities 1945-1948 were
already
unclassified. Total quantities of the stockpile after 1961 remain classified
since there
were weapon systems introduced in 1962 and later that are still in the current
stockpile.

Builds numbers reported below are total annual quantities for fully retired
weapon
systems. This represents a subset of United States nuclear weapon production.
The
annual production of nuclear weapons still in the stockpile remain classified.

Retirement rates from 1984 to 1989 are adjusted from the stockpile memorandum
retirement numbers to better reflect the number of weapons truly retired.
Retirement
numbers reported below reflect weapons retired for conversions, modifications,
or
disassemblies for disposal. Retirement numbers depend critically on how the
term
retirement is defined.

Disassemblies reported below reflect only the number of weapons dismantled for
actual
disposal. It should be noted that raw disassembly numbers published elsewhere
by the
Department are typically larger reflecting the number of times a weapon is
disassembled but not necessarily disassembled for disposal or dismantlement
purposes. An example of this would be for repair, a weapon might be
disassembled to
replace a part and then returned to the stockpile. Records prior to 1980 on
disassemblies for disposal are not immediately available but will be provided
in the
future if possible.